7 Inch Ring by 12 Inch Filter Socks 100 Micron - MEDIUM - Aquarium Felt Filter Bags - 4 Pack CUSTOM MADE - Our filter socks are constructed only when our factory receives our exact specifications; YEARS OF TESTING produced the perfect blueprint.... Read More

4 Inch Opening by 14 Inch Long - Long Felt Filter Bags - 4 Pack CUSTOMER AND PROFESSIONALS CHOICE - Our 200 micron size polypropylene filter socks are BEST SELLERS - the TOP CHOICE for my clients as well as my aquarium service technicians and bo... Read More

4" Ring by 10.5 Inch Long Medium 200 Micron - 50 Pack CUSTOMER AND PROFESSIONALS CHOICE - Our 200 micron size polypropylene filter socks are BEST SELLERS - the top choice for my clients as well as my aquarium service technicians and both chose 2... Read More